Quote: The Windows XP Professional operating system is the best choice for businesses of all sizes.[/B] Windows XP Professional integrates the strengths of Windows 2000 Professional, such as standards-based security, manageability, and reliability, with the best business features of Windows 98 and Windows Millennium Edition, such as plug and play, simplified user interface, and innovative support services. This combination creates the best desktop operating system for business. Whether your business deploys Windows XP Professional on a single computer or throughout a worldwide network, this operating system increases your computing power while lowering cost of ownership for desktop computers.Windows XP Service Pack 3 (SP3) includes all previously released updates for the operating system. This update also includes a small number of new functionalities, which do not significantly change customers experience with the operating system. Windows® XP Service Pack 3 (SP3) includes all previously released updates for the operating system. This update also includes a small number of new functionalities, which do not significantly change customers experience with the operating system. This white paper summarizes what is new in Windows XP SP3. You can obtain Windows XP SP3 from Windows Update. Note : Licenses for Windows XP can be obtained through one of three basic channels: retail, original equipment manufacturer (OEM), or Volume Licensing. Heres a brief explanation on various licenses or licensing schemes that available for Windows operating system from Microsoft. * Retail: Windows operating system products that are acquired through a retail store (physical or online) are individually licensed and are activated. Retail version of Windows generally can be purchased in two license pricing levels, namely Full of Upgrade license. * OEM: OEM (Original Equipment Manufacturer) license is a restricted version of Windows that included with a new computer. Manufacturers and vendors ship Windows with OEM license as its deeply discounted when compared with retail copy. OEM license has limitation that it can only perform a clean install or custom install, but not upgrade. * Volume Licensing: Volume licenses is a software license programs (depending on the Volume Licensing program, subscriber may receive media, or has the option to acquire media or supplemental media, documentation, and product support separately as needed) that are sold in bulk to corporate customers, in quantities of five or more at a time. There are actually many options and choices available for volume licensing, such as Open Value, Open Value Subscription, Open License, Select Plus, Select License, Enterprise Agreement, and Enterprise Subscription Agreement.